IT alignment has been receiving a considerable attention amongst IS scholars and researchers. Despite the growth of IT alignment literature, further review indicates that most of the studies are carried out in either commercial or entrepreneur-led organizations. In correspondence to a strong call for IT alignment studies to be carried out within the setting of public sector organizations, this study attempts to fulfil the gap by examining antecedents of IT alignment in the context of public sector. Drawing on the previous literature on IT alignment, the effects of five antecedents of IT alignment namely; shared domain knowledge, prior IS implementation success, centralization, formalization and CEO-CIO relationships are examined. It is further argued that high level of IT alignment in government sectors contributes towards the improvement of government’s performance which is represented by improved public service delivery. Using case study on the use of E-Syariah in Malaysian Islamic Judicial System, the researcher finds out that all antecedents except centralization and formalization, have direct and positive impacts towards IT alignment practice in public sector, which consequently improve the delivery of government services to the public.